Fig. 1. (a) Mechanism of SERF atomic magnetometer; (b) Measurement of setup of SERF atomic magnetometer

Fig. 2. Resonance spectrum linewidth features under the cell temperature varying from 120 °C to 210 °C

Fig. 3. Schematic structure of FP cavity

Fig. 4. Influence of (a) absorption and (b) off-resonance parameter on output light rotation angle

Fig. 5. Relationship between the laser interaction distance and output light rotation angle in three conditions, from top to bottom are α=0, Δφ=0; α=0.04 m⁻¹, Δφ=0; α=0, Δφ=π/32, respectively

Fig. 6. Evolution of amplification factor along with the laser transmission distance under two sets: the off-resonance Δφis π/64 and π/32 respectivitly for different absorption coefficients

Fig. 7. (a) Dynamic diagram of output light rotation angle ψ with the parameters of α and Δφ; (b) Decline of output light rotation angle with increase of absorption coefficients